Toothbrush



FIG. 1 is a perspective view of a toothbrush, showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is an end view thereof; and

FIG. 5 is a view from the opposite end thereof.

The ornamental design for a toothbrush, as shown and described.